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2007MNRAS.376..929G - Mon. Not. R. Astron. Soc., 376, 929 (2007/April-2)
Discovery of extensive optical emission associated with the X-ray bright, radio faint Galactic SNR G156.2+5.7.
GERARDY C.L. and FESEN R.A.
Abstract (from CDS):
Comparison of the observed Hα emission with the ROSAT PSPC X-ray image of G156.2+5.7 shows that the thin Balmer-dominated filaments lie along the outermost edge of the remnant's detected X-ray emission. Brighter radiative emission features are not coincident with the remnant's brightest X-ray or radio regions. Areas of sharply weaker X-ray flux seen in the ROSAT image of G156.2+5.7 appear spatially coincident with dense interstellar clouds visible on optical and IRAS 60- and 100-µm emission images, as well as maps of increased optical extinction. This suggests significant X-ray absorption in these regions due to foreground interstellar dust, especially along the western and southern limbs. The close projected proximity and alignment of the remnant's brighter, radiative filaments with several of these interstellar clouds and dust lanes hint at a possible physical interaction between the G156.2+5.7 remnant and these interstellar clouds and may indicate a smaller distance to the remnant than previously estimated.
Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS
Journal keyword(s): ISM: individual: G156.2+5.7 - supernova remnants
Simbad objects: 14
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